4405091 has 4 divisors (see below), whose sum is σ = 4664232. Its totient is φ = 4145952.

The previous prime is 4405073. The next prime is 4405097. The reversal of 4405091 is 1905044.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4405091 - 2¹⁸ = 4142947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4405097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129545 + ... + 129578.

It is an arithmetic number, because the mean of its divisors is an integer number (1166058).

Almost surely, 2^4405091 is an apocalyptic number.

4405091 is a deficient number, since it is larger than the sum of its proper divisors (259141).

4405091 is a wasteful number, since it uses less digits than its factorization.

4405091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259140.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 4405091 is about 2098.8308650294. The cubic root of 4405091 is about 163.9274292244.

The spelling of 4405091 in words is "four million, four hundred five thousand, ninety-one".